/**
 * 
 */
package com.googlecode.cswish.security.type;

import com.googlecode.cswish.security.auth.Parameter;

/**
 * @author Jerry.Feng Date: Nov 8, 2007 12:01:05 PM
 * @version $id: $
 */
public interface Expression {
	boolean execute(Parameter parameter);
	boolean implies(Expression expression);
}